suspects robbed a 7/11 and then shot and killed a police officer at the massachusetts institute of technology. then they stole the officer's crozier. then they carjacked a mercedes s.u.v. briefly kidnapping that driver. the driver was released unharmed. then a dramatic chase and shooting where the suspects threw explosives out the window at pursuing officers. the firefight ended in watertown when one of the suspects was shot dead by police. he is the man wearing the black cap in the f.b.i. photos. the intense manhunt began for the second suspect which is still going on. police are going door-to-door looking for him. residents are being told not to open their door to anyone except law enforcement. that is exg tosuarbuound the bs. public schools have canceled classes. ar cambridge have canceled classes. ought to acrchg halt alls been around boston as the intense manhunt continues for this second suspect. we are learning that abc7 news is confirming that the two suspects are believed to be brothers, possibly from check nea or turkey. the two are believed to